ArcheAge besides attack people in PvP. For example, you can be one of the people who are attractive targets to attack in PvP. That's not the biggest reason to get involved in the game's Trade missions, however. Sure, you'll be carrying around valuable cargo that's attractive to marauders, pirates, and scavengers alike, but successfully bringing a package from one point to another can provide you with plenty of wealth and fame, so it's got an appeal.
Trade Packs allow players to earn valuable crafting materials as well as Gilda Stars, valuable for endgame play. The further you transport a pack, the more rewards you receive for its transport. However, packs also slow you down and force you to forego the use of World Gates or gliders, making the journey that much more harrowing. For the full rundown, check the official preview and get ready to start shipping things around the world.